As of January, 2008, there were two commissioners and four vacancies, with a stalemate due to the Republicans insistence on the confirmation of Hans von Spakovsky.
On May 8, 2008, Pres. Bush increased the partisan battle by withdrawing the renomination of David Mason, who had been critical of John McCain's claim that McCain can withdraw from public funding of his campaign after opting into the system, and using it as a guarantee for a loan. (See: "Crippled Election Commission" and "In F.E.C. Moves, Some See Effort to Aid McCain")
On May 20, 2008, Pres. Bush withdrew the nomination of Hans von Spakovsky and nominated Matthew Petersen for that seat.
The current status of the FEC is:
Terms from May 1, 2003 to April 30, 2009:
Terms from May 1, 2005 to April 30, 2011:
Vacant, last occupied by Hans A. von Spakovsky via a recess appointment
which expired Dec, 2007.
Nominee: Matthew Petersen (R)
Von Spakovsky nominated Dec. 2005, but Senate never voted on the nomination.
Bush withdrew Von Spakovsky's nomination on May 20, 2008, and nominated
Matthew Petersen, a Republican staffer on the Senate RUles Committe on
May 22, 2008.
Petersen previously served on the U.S. House of Representatives
Committee on House Administration, under the leadership of former Rep.
Bob Ney.
Terms from May 1, 2007 to April 30, 2013:
Ellen L. Weintraub (D), confirmed March 18, 2003; term has expired,
still serving.*
Nominee: none (apparently Weintraub will continue serving).
The Democrats wouldn't confirm von Spakovsky and the Republicans threatened to fillibuster if other nominations were brought up to a vote before von Spakovsky. The Republicans had a majority in the Senate in 2006, and could have confirmed the von Spakovsky and the other nominees from Dec., 2005, but never did, and apparently, never tried to.
The withdrawl of von Spakovsky's nomination may fix the impass.
The FEC rules by majority vote and many actions require yes votes by four commissioners.
Here are some URLs to FEC pages from which I assembled the above facts.
http://www.whitehouse.gov/news/releases/2008/05/20080506-12.html
(May 8, 2008, nominations/withdrawals)
http://www.fec.gov/press/press2006/20060106members.html
http://www.fec.gov/press/press2007/20070314Toner.shtml
http://www.fec.gov/pdf/record/2006/feb06.pdf
http://www.fec.gov/members/mason/masonbio.shtml
http://www.fec.gov/members/weintraub/weintraubbio.shtml
(B) A member of the Commission may serve on the Commission after the expiration of his or her term until his or her successor has taken office as a member of the Commission.
Updated: May 11, 2008